bianchang1=float(input("输入边长1:"))
bianchang2=float(input("输入边长2:"))
bianchang3=float(input("输入边长3:"))
if bianchang1+bianchang2>bianchang3 and bianchang1+bianchang3>bianchang2 and bianchang2+bianchang3>bianchang1:
    print("能组成三角形")
else:
    print("不能组成三角形")

